<![CDATA[Pineapple waste, which is rich in lignocellulosic compounds, can be thermally converted into environmentally friendly bioherbicides. This study aimed to evaluate the potential of lignin-derived compounds from lignocellulosic waste as a bioherbicide and to identify an effective formulation for reducing the use of diuron-based herbicides in pineapple plantations. Pyrolysis was conducted at subcritical temperatures, and the resulting wood vinegar was analyzed by GC MS to identify phenolic compounds. Pyrolysis at 250–300 °C produced phenolic compounds accounting for 40.20% of the chromatogram area, while pyrolysis at 400–450 °C produced 49.61%. The efficacy test included several treatments: pyrolysis products from 400–450 °C at 5% and 10%, pyrolysis products from 250 350 °C at 5% and 10%, diuron herbicide at 0.5 g/L, combinations of herbicide with two selected pyrolysis products, and a standard diuron application as the control. The results showed that wood vinegar produced at 400–450 °C and applied at 10% could suppress seed bank germination, with an effectiveness comparable to that of diuron at 0.5 g/L. This wood vinegar formulation was then used in a second efficacy test under pineapple cultivation conditions to assess whether diuron use could be reduced when combined with wood vinegar. The results indicated that combining 70% herbicide with 10% wood vinegar suppressed weed growth to a level similar to the 100% herbicide standard treatment. This study may serve as a reference for reducing the use of synthetic herbicides in pineapple cultivation.]]>
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